<template>
  <div class="table">
    <div class="crumbs">
      <i class="el-icon-tickets">歌单歌曲管理</i>
    </div>
    <div class="container">
      <div class="handle-box">
        <el-button type="primary" size="mini" @click="delAll">批量删除</el-button>
        <el-input v-model="select_word" size="mini" placeholder="请输入歌名" class="handle-input"/>
        <el-button type="primary" size="mini" @click="centerDialogVisible = true">歌曲添加</el-button>
      </div>
    </div>
    <el-table :data="tableData" border style="width: 100%"  height="680px" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="40"></el-table-column>
      <el-table-column prop="name" label="歌手-歌名" align="center"></el-table-column>
      <el-table-column label="操作" width="150" align="center">
        <template slot-scope="scope">
          <el-button size="mini" type="danger" @click="handleDelete(scope.row.id)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>
    <el-dialog title="歌曲添加" :visible.sync="centerDialogVisible" width="400px" center>
      <el-form :model="registerForm" ref="registerForm" label-width="80px" id="tf">
        <el-form-item prop="singerName" label="歌手名" size="mini">
          <el-input v-model="registerForm.singerName" placeholder="歌手名"></el-input>
        </el-form-item>
        <el-form-item prop="songName" label="歌曲名" size="mini">
          <el-input v-model="registerForm.songName" placeholder="歌曲名"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer">
         <el-button size="mini" @click="centerDialogVisible = false">取消</el-button>
         <el-button size="mini" @click="getSongId">确定</el-button>
      </span>
    </el-dialog>

    <el-dialog title="删除歌曲" :visible.sync="delVisible" width="300px" center>
      <div align="center">删除不可恢复，是否确定删除？</div>
      <span slot="footer">
                <el-button size="mini" @click="delVisible = false">取消</el-button>
                <el-button size="mini" @click="deleteRow">确定</el-button>
            </span>
    </el-dialog>
  </div>
</template>

<script>
  import {mixin} from "../mixins";
  import {listSongDetail,songOfSongId,songOfSongName,listSongAdd,delListSong} from "../api/index";
  export default {
    mixins:[mixin],
    name: "SongPage",
    data(){
      return {
        songListId:'', //歌单id
        centerDialogVisible: false,
        delVisible: false,          //删除弹窗是否显示
        registerForm:{
          songName:'', //歌曲名
          singerName:'',//歌手名
        },
        tableData:[],
        tempData:[],
        select_word:'',
        idx: -1,          //当前选择项
        multipleSelection: [], //哪些项已打勾
      };
    },
    watch:{
      //搜索框里边的内容发生变化的时候，搜索结果table的内容跟着它一起变化
      select_word:function () {
        if(this.select_word == ''){
          this.tableData = this.tempData;
        }else{
          this.tableData = [];
          for(let item of this.tempData){
            if (item.name.includes(this.select_word)) {
              this.tableData.push(item)
            }
          }
        }
      }
    },
    created(){
      this.songListId = this.$route.query.id;
      this.getData();
    },
    methods:{
      getData(){
        this.tempData = [];
        this.tableData = [];
        //根据歌单id查询歌曲列表
        listSongDetail(this.songListId).then(res =>{
          for(let item of res){
            // console.log(item[0].id)
            this.getSong(item.songId);
          }
        })
      },
      //根据歌曲id查询歌曲对象，放到tableData和tempData
      getSong(id){
        songOfSongId(id).then(res=>{
          this.tempData.push(res)
          this.tableData.push(res)
        }).catch(err =>{
          console.log(err);
        })
      },

      //添加歌曲前的准备，通过歌名从song表中获取到歌曲id
      getSongId(){
        let _this = this;
        var songOfName = _this.registerForm.singerName+"-"+_this.registerForm.songName;
        // alert(songOfName)
        songOfSongName(songOfName).then(
          res => {
            _this.addSong(res[0].id)
          }
        )
      },
      //将获取到的歌曲id传给addSong方法，添加歌曲
      addSong(songId){
        let _this = this;
        let params = new URLSearchParams();
        params.append('songId',songId);
        //页面跳转时传过来的
        params.append('songListId',this.songListId);

        listSongAdd(params)
          .then(res => {
            if(res.code == 1){
              this.getData();
              this.notify("添加成功","success");
            }else{
              this.notify("添加失败","error");
            }
          })
          .catch(err => {
            console.log(err);
          });
        _this.centerDialogVisible = false;
      },

      //删除一条歌曲
      deleteRow(){
        delListSong(this.idx,this.songListId)
          .then(res => {
            if(res){
              this.getData();
              this.notify("删除成功","success");
            }else{
              this.notify("删除失败","error");
            }
          })
          .catch(err => {
            console.log(err);
          });
        this.delVisible = false;
      },
    },


  }
</script>

<style scoped>
  .handle-box{
    margin-bottom: 20px;
  }
  .song-img{
    width: 100%;
    height: 80px;
    border-radius: 5px;
    margin-bottom: 5px;
    overflow: hidden;
  }

  .handle-input{
    width:300px;
    display: inline-block;
  }
  .pagination{
    display: flex;
    justify-content: center;
  }
  .play {
    position: absolute;
    z-index: 100;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    top: 18px;
    left: 15px;
  }

  .icon {
    width: 2em;
    height: 2em;
    color: white;
    fill: currentColor;
    overflow: hidden;
  }
</style>
